On 12/21/2010 01:37 PM, Konrad Rzeszutek Wilk wrote:> If we swapped over from using an p2m_mid_identical to p2m_mid_missing> (earlier call to set_phys_to_machine) and then started going through the> PFNs in descending order to program a new MFN (balloon worker), we would> end up in this code path. At that point we would set up new page filled with> pointers to p2m_identity instead of p2m_missing. This had the disastrous> effect that get_phys_to_machine on that PFN would return an 1-1 mapping> instead of INVALID_P2M_ENTRY resulting in hitting a BUG check in balloon driver.>Are you going to fold this into the appropriate patch later?